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### 20 Cards in this Set

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• Back
 Projectile an object that is thrown Terminal Velocity the greatest velocity a falling object can achieve Friction a force that one surface exerts on another surface when they rub against each other Inertia the tendency of an object to resist change in its motion Newton a unit of measure that equals the force required to move 1 kilogram of mass 1 meter per second Fluid Friction friction that occurs as an object moves through a fluid Gravity the attractive forces between objects law of conservation of momentum the rule that in the absence of outside forces, the total momentum of objects that interact does not change weight the force of gravity on an object at the surface of a planet air resistance a type of fluid friction exerted on objects as they fall through the air balanced forces equal forces acting on an object in opposite directions rolling friction friction that occurs when an object rolls over a surface mass the amount of matter in an object momentum the product of an objcets velocity and mass static friction the friction that acts on objects that are not moving force a push or a pull net force the overall force on an object when all the individual forces acting on it are added together unbalanced forces forces that produce a nonzero net force, which changes an objects motion free fall the motion of a falling object when the only force acting on it is gravity sliding friction friction that occurs when one object slides over another